Method of securing stay rods to plates



, July 3,1928.

J. PETI'Y METHOD OF SECURING STAY RODS TO PLATES Filed 001;. l, 19271710 rzivk JakmPei fy Patented July 3, 1928.

. UNITED STATES PATENT OFFICE.

JOHN PETTY, OF LEBANON, PENNSYLVANIA, ASSIGNOR TO JO PET, INC., OFLEBANON, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

METHOD OI SECURING STAY RODS T PLATES.

Application filed October 1, 1927. Serial No. 223,807.

My invention relates to the construction of boilers and the like inwhich stay rods are employed and has for its object to filOVldG animproved method for securing t e stay rod to a plate, by employingwhich, a projecting end of the rod extending through a hole in the platecan be formed into a rivet head restin against the outside of the platewithout su jecting the portion of the rod lying in and beyond the holeto the risk of distortion and by means of which the rivet head formed onthe rod is maintained in tight contact with the outer face of the plate.My improved method consists in inserting the rod in the plate so thatits end will project on the outside thereof to a sufficient extent toprovide material for the formation of a rivet head, then securing therod to oneside of the plate, preferably the inside thereof, by means ofan electric weld or similar fused union formin not only a suflicientlysecure attachment iietween the parts but also as a conductor for heatbetween the rod and the plate, then heating the projecting end of therod to a for in temperature and forging it into a rivet ea against theoutside of the plate. My invention will be best understood as furtherdescribed in connection with the drawings in which Figure 1 represents acorner of a boiler with a diagonal stay rod, the upper end of which issecured tothe shell by the means described in my prior Patent 1,557,084of October 13, 1925, while the lower end of the stay rod is shown asrojecting through a hole in the boiler head? Figure 2 is a fragmentaryview showing the next stage ofmy method, and

Figure 3, a fragmentary view showing the completion of the attachmentbetween the stay rod and the boiler head.

A indicates the head of the boiler; B its shell. C is the stay bolt, heupper end of which is'formed as described in my former patent, with thehead D and a rivet formin projection D extending1 through the shel andformed into a rivet ead D. In carry ing out my new method, I project theend E of the stay rod through a hole A in the sheet to which it is to beattached and I then place a Wire F in near contact with the inner faceof the plate A and the adjacent portions of the stay rod and form afused union, as indicated at F the stay bolt to the inner face of theplate. I then heat the projecting end E of the stay rod to a forgingtemperature and forge it down against the outer face of the plate to theform of a rivet head, as indicated at E in Fig. 3.

The fused union formed between the stay bolt and the sheet throu h whichit passes, serves the purpose of su ciently uniting the plate and staybolt to hold them in correct osition while the rivet head E is beingormed against the outer face of the plate. It also performs the functionof forming an eflicient heat conducting connection between the stay andthe plate so that the heatin of the end E of the stay rod does notresult in unduly heating the inner portion of the stay, the heat beingconducted from the heated end of the stay rod to the plate and thencedissipated b radiation to a sufficient extent to prevent t e over-heatinof the stay and the consequent risk of de orming it during the heatingand forging o erations.

M method has the ad itional advantage in t at the stay bein secured tothe inner face of the plate an a rivet head restin onthe outer face ofthe plate, the cooling 0 the end of the stay after the formation oftherivet tends to draw the rivet head tightly against the outer face ofthe plate.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. The method of securing a stay rod to a sheet metal plate whichconsists in inserting the stay rod in a hole in the plate to a positionin which its end will project beyond the outer surface of the plate to asufficient extent to be formed into a rivet head, then securing the rodto one side of the plate by 95 a fused union, then heating theprojecting in Fig. 2, uniting end of the rod to forging temperature andforging it into a rivet head against the outer face of the late.

2. The met 0d of securing a stay rod to a 5 sheet metal plate whichconsists in inserting the stay rod in a hole in the plate to a positionin which its end will project beyond the outer surface of the plate to aeufiieient &-

7 JOHN PETTY.

